appendix a - site-specific uses and criteria for ...appendix a - site-specific uses and criteria for...

Figure: 30 TAC §307.10(1)

Appendix A - Site-specific Uses and Criteria for Classified Segments

The following tables identify the water uses and supporting numerical criteria for each of the state's classified segments. The tables are ordered by basin with the segment number and segment name given for each classified segment. Marine segments are those that are specifically titled as "tidal" in the segment name, plus all bays, estuaries and the Gulf of Mexico. The following descriptions denote how each numerical criterion is used subject to the provisions in §307.7 of this title (relating to Site-Specific Uses and Criteria), §307.8 of this title (relating to Application of Standards), and §307.9 of this title (relating to Determination of Standards Attainment).

Segments that include reaches that are dominated by springflow are footnoted in this appendix and have critical low-flows calculated according to §307.8(a)(2) of this title. These critical low-flows apply at or downstream of the spring(s) providing the flows. Critical low-flows upstream of these springs may be considerably smaller. Critical low-flows used in conjunction with the TCEQ regulatory actions (such as discharge permits) may be adjusted based on the relative location of a discharge to a gauging station.

The criteria for Cl-1 (chloride), SO4-2 (sulfate), and TDS (total dissolved solids) are listed

in this appendix as maximum annual averages for the segment.

Dissolved oxygen criteria are listed as minimum 24-hour means at any site within the segment. Absolute minima and seasonal criteria are listed in §307.7 of this title unless otherwise specified in this appendix. Dissolved oxygen criteria of 1.0 mg/L in this appendix will be considered minimum values at any time.

The pH criteria are listed as minimum and maximum values expressed in standard units at any site within the segment.

The freshwater indicator bacteria for recreation is E. coli. Enterococci is the indicator bacteria for recreation in saltwater and certain high saline inland water bodies with typical high conductivity values. The appropriate bacterial criteria are listed in the appendix under the Indicator Bacteria column and are applied as specified in §307.7(b)(1) of this title. The indicator bacteria for suitability for oyster waters is fecal coliform. The fecal coliform criteria for oyster waters is 14 colonies per 100 mL as specified in §307.7(b)(3)(B) of this title.

The criteria for temperature are listed as maximum values at any site within the segment except as noted in §307.4(h) of this title (relating to General Criteria) and §307.8(b) of this title.

Footnotes are defined at the end of each basin or bay and estuary table, as appropriate.

Canadian River Basin Designated Uses and Numeric Criteria

Segment No.

Canadian River Basin Segment Names

Recreation Use

Aquatic Life Use

Domestic Water

Supply Use Other Uses

Cl-1

(mg/L)

-2SO4

(mg/L) TDS

(mg/L)

Dissolved Oxygen (mg/L)

pH Range (SU)

Indicator Bacteria1

#/100 mL Temperature (degrees F)

0101 Canadian River Below Lake Meredith PCR1 H 1,975 760 5,000 5.0 6.5-9.0 126 95 0102 Lake Meredith PCR1 E PS 400 350 1,300 6.0 6.5-9.0 126 85

0103 Canadian River Above Lake Meredith PCR1 H 1,050 540 4,500 5.0 6.5-9.0 126 95

0104 Wolf Creek PCR1 H 420 125 1,125 5.0 6.5-9.0 126 93 0105 Rita Blanca Lake NCR L WF2 200 200 1,000 3.0 6.5-9.0 126 85

1 The indicator bacteria for freshwater is E. coli. 2 The segment is designated as high quality waterfowl habitat.

Red River Basin Designated Uses and Numeric Criteria

Segment No.

Red River Basin Segment Names

Recreation Use

Aquatic Life Use

Domestic Water


Cl-1

(mg/L)

-2SO4

(mg/L) TDS

(mg/L)


pH Range (SU)

Indicator Bacteria1


0201 Lower Red River PCR1 H PS 375 250 1,100 5.0 6.5-9.0 126 93 0202 Red River Below Lake Texoma PCR1 H PS 375 250 1,100 5.0 6.5-9.0 126 93 0203 Lake Texoma PCR1 H PS 600 300 1,500 5.0 6.5-9.0 126 92 0204 Red River Above Lake Texoma PCR1 H 2,000 1,200 6,000 5.0 6.5-9.0 33 93 0205 Red River Below Pease River PCR1 H 5,000 2,000 10,000 5.0 6.5-9.0 33 93 0206 Red River Above Pease River PCR1 H 12,000 4,000 25,000 5.0 6.5-9.0 33 93

0207 Lower Prairie Dog Town Fork Red River

PCR1 H 37,000 5,300 46,200 5.0 6.5-9.0 33 93

0208 Lake Crook PCR1 H PS 75 150 350 5.0 6.5-9.0 126 90 0209 Pat Mayse Lake PCR1 H PS 100 175 350 5.0 6.5-9.0 126 90 0210 Farmers Creek Reservoir PCR1 H PS 200 60 550 5.0 6.5-9.0 126 93 0211 Little Wichita River PCR1 H PS 450 250 500 3.02 6.5-9.0 126 91 0212 Lake Arrowhead PCR1 H PS 250 50 500 5.0 6.5-9.0 126 93 0213 Lake Kickapoo PCR1 H PS 100 50 400 5.0 6.5-9.0 126 90 0214 Wichita River Below Diversion Lake PCR1 H 1,800 800 5,000 5.0 6.5-9.0 126 90 0215 Diversion Lake PCR1 H 1,800 1,100 5,000 5.0 6.5-9.0 126 90 0216 Wichita River Below Lake Kemp PCR1 H 1,925 960 5,000 5.0 6.5-9.0 126 90 0217 Lake Kemp3 PCR1 H 7,000 2,500 15,000 5.0 6.5-9.0 33 93 0218 Wichita/North Fork Wichita River4 PCR1 H 7,500 2,800 16,250 5.0 6.5-9.0 33 93 0219 Lake Wichita PCR1 H 1,000 400 1,800 5.0 6.5-9.0 126 90 0220 Upper Pease/North Fork Pease River PCR1 H 12,000 3,500 30,000 5.0 6.5-9.0 33 91 0221 Middle Fork Pease River PCR1 H 870 1,400 2,800 5.0 6.5-9.0 126 91 0222 Salt Fork Red River PCR1 H 400 1,400 3,000 5.0 6.5-9.0 126 93 0223 Greenbelt Lake PCR1 H PS 250 200 750 5.0 6.5-9.0 126 93 0224 North Fork Red River PCR1 H 800 1,200 2,500 5.0 6.5-9.0 126 91 0225 McKinney Bayou PCR1 L PS 60 90 400 3.0 6.0-8.5 126 93 0226 South Fork Wichita River3 PCR1 H 12,000 3,650 31,000 5.0 6.5-9.0 33 93 0227 South Fork Pease River PCR1 H 270 200 1,000 5.0 6.5-9.0 126 91 0228 Mackenzie Reservoir PCR1 H PS 50 200 500 5.0 6.5-9.0 126 90

0229 Upper Prairie Dog Town Fork Red River

PCR1 H 350 675 2,000 5.0 6.5-9.0 126 93

0230 Pease River PCR1 I 12,000 3,500 30,000 4.0 6.5-9.0 33 91

1 The indicator bacteria for freshwater is E. coli. The indicator bacteria for Segments 0204, 0205, 0206, 0207, 0217, 0218, 0220, 0226, and 0230 is Enterococci.

2 The 24-hour minimum dissolved oxygen criterion is 2.0 mg/L. 3 It is anticipated that inorganic chemical quality should improve following completion and as a result of the

operation of salinity control projects. 4 The critical low-flow is calculated according to §307.8(a)(2)(B) of this title.

Sulphur River Basin Designated Uses and Numeric Criteria

Segment No.

Sulphur River Basin Segment Names

Recreation Use

Aquatic Life Use

Domestic Water


Cl-1

(mg/L)

-2SO4

(mg/L) TDS

(mg/L)


pH Range (SU)

Indicator Bacteria1


0301 Sulphur River Below Wright Patman Lake PCR1 H 120 100 500 5.0 6.0-8.5 126 90

0302 Wright Patman Lake PCR1 H PS 75 75 400 5.0 6.5-9.5 126 90 0303 Sulphur/South Sulphur River PCR1 H 80 180 600 5.0 6.0-8.5 126 93 0304 Days Creek PCR1 I 525 75 850 4.0 6.0-8.5 126 90 0305 North Sulphur River2,3 PCR1 I2 190 475 1,320 5.0 6.0-8.5 126 93 0306 Upper South Sulphur River PCR1 I 80 180 600 4.0 6.5-9.0 126 93 0307 Jim L. Chapman Lake PCR1 H PS 50 50 225 5.0 6.5-9.0 126 93

1 The indicator bacteria for freshwater is E. coli. 2 For the purpose of assessment, the intermediate aquati c life use applies only to the fish community. The benthi c

community is to be assessed using a limited aquatic life use. 3 The segment is an intermittent stream with perennial pools.

Cypress Creek Basin Designated Uses and Numeric Criteria

Segment No.

Cypress Creek Basin Segment Names

Recreation Use

Aquatic Life Use

Domestic Water


Cl-1

(mg/L)

-2SO4

(mg/L) TDS

(mg/L)


pH Range (SU)

Indicator Bacteria1


0401 Caddo Lake PCR1 H PS 50 50 200 5.0 5.5-9.0 126 90

0402 Big Cypress Creek Below Lake O' the Pines PCR1 H PS 100 50 300 5.0 5.5-8.0 126 93

0403 Lake O' the Pines PCR1 H PS 80 50 300 5.0 6.0-8.5 126 93

0404 Big Cypress Creek Below Lake Bob Sandlin SCR1 I 100 100 500 4.0 6.0-8.5 630 90

0405 Lake Cypress Springs PCR1 H PS 100 100 500 5.0 6.0-8.5 126 93 0406 Black Bayou2 PCR1 H PS 80 50 300 ≤5.03 5.5-8.0 126 90 0407 James' Bayou2 PCR1 H PS 100 50 300 ≤5.03 5.5-8.0 126 90 0408 Lake Bob Sandlin PCR1 H PS 50 65 150 5.0 6.5-9.0 126 90 0409 Little Cypress Bayou (Creek) PCR1 H PS 100 50 300 ≤5.03 5.5-8.5 126 90 0410 Black Cypress Bayou (Creek) PCR1 H 50 50 200 ≤5.03 5.5-8.0 126 90

1 The indicator bacteria for freshwater is E. coli. 2 The segment is an intermittent stream with perennial pools. 3 A 24-hou r average dissolv ed oxyg en criterio n of 5.0 mg/L is the upper bounds if the following indicated dissol ved

oxyge n equation predicts dissolved oxygen values that are higher than 5.0 mg/L. When the 24-hour average dissolve d oxygen is predicted to be lower tha n 1.5 mg/L, then the dissolved oxygen criterion is set at 1.5 mg/L. When the 24-hour dissolv ed oxyg en criterion is greater than 2.0 mg/L, the corresponding 24-hou r minimum dissol ved oxyg en criterion should be 1.0 mg/L less than the calculated 24-hour average. When the 24-hour dissolved oxygen criterio n is less than o r equa l to 2.0 mg/L, the corresponding 24-hour minimu m dissolved oxyg en criterio n should be 0.5 mg/L less than the calculated 24-hour average criterion. When stream flow is below 0.1 cfs, then 0.1 cfs is the presumed flow that should be used in the equation. This equation supersedes Table 4 in §307.7(b)(3)(A) o f this title.

DO = 12.11 – 0.309T + 1.05 logQ – 1.02 logWS where DO = 24-hour average dissolved oxyge n criterion T = temperature in degrees Celsius Q = flow in cfs WS = watershed size in square km (up to 1000 km)

Sabine River Basin Designated Uses and Numeric Criteria

Segment No.

Sabine River Basin Segment Names

Recreation Use

Aquatic Life Use

Domestic Water


Cl-1

(mg/L)

-2SO4

(mg/L) TDS

(mg/L)


pH Range (SU)

Indicator Bacteria1


0501 Sabine River Tidal PCR1 H 4.0 6.0-8.5 35 95 0502 Sabine River Above Tidal PCR1 H PS 50 50 200 5.0 6.0-8.5 126 91 0503 Sabine River Above Caney Creek PCR1 H PS 50 50 200 5.0 6.0-8.5 126 91 0504 Toledo Bend Reservoir PCR1 H PS 70 50 240 5.0 6.0-8.5 126 93

0505 Sabine River Above Toledo Bend Reservoir PCR1 H PS 175 100 400 5.0 6.0-8.5 126 93

0506 Sabine River Below Lake Tawakoni PCR1 H PS 200 100 500 5.0 6.0-8.5 126 90 0507 Lake Tawakoni PCR1 H PS 752 752 4002 5.0 6.0-9.0 126 93 0508 Adams Bayou Tidal PCR1 H 4.0 6.0-8.5 35 95 0509 Murvaul Lake PCR1 H PS 150 75 500 5.0 6.5-9.0 126 92 0510 Lake Cherokee PCR1 H PS 75 50 250 5.0 6.0-8.5 126 95 0511 Cow Bayou Tidal PCR1 H 4.0 6.0-8.5 35 95 0512 Lake Fork Reservoir PCR1 H PS 50 50 200 5.0 6.5-9.0 126 95 0513 Big Cow Creek PCR1 H PS 75 50 300 5.0 5.5-8.5 126 90 0514 Big Sandy Creek PCR1 H PS 75 50 300 5.0 6.0-8.5 126 90 0515 Lake Fork Creek PCR1 H PS 100 75 400 5.0 6.0-8.5 126 90

1 The indicator bacteria for freshwater is E. coli and for saltwater is Enterococci. 2 Th is criterion will be reviewed upon the next water quality standards revision and is contingent upon the

continuati on and progress o f a water reuse project. The origina l criteria (TDS o f 200, Cl-1 of 50, and SO -24 of 50)

may be appropriate if the water reuse project is not pursued.

Neches River Basin Designated Uses and Numeric Criteria

Segment No.

Neches River Basin Segment Names

Recreation Use

Aquatic Life Use

Domestic Water


Cl-1

(mg/L)

-2SO4

(mg/L) TDS

(mg/L)


pH Range (SU)

Indicator Bacteria1


0601 Neches River Tidal PCR1 I 3.0 6.0-8.5 35 95

0602 Neches River Below B. A. Steinhagen Lake PCR1 H PS 50 50 200 5.0 6.0-8.5 126 91

0603 B. A. Steinhagen Lake PCR1 H PS 50 50 200 5.0 6.0-8.5 126 93 0604 Neches River Below Lake Palestine PCR1 H PS 50 50 200 5.0 6.0-8.5 126 91 0605 Lake Palestine PCR1 H PS 50 50 200 5.0 6.5-9.0 126 90 0606 Neches River Above Lake Palestine PCR1 I PS 100 50 300 4.0 6.0-8.5 126 95 0607 Pine Island Bayou PCR1 H PS 150 50 300 3.0 6.0-8.5 126 95 0608 Village Creek PCR1 H PS 150 75 300 5.0 5.5-8.0 126 90

0609 Angelina River Below Sam Rayburn Reservoir PCR1 H PS 70 50 250 5.0 6.0-8.5 126 90

0610 Sam Rayburn Reservoir PCR1 H PS 100 100 400 5.0 6.0-8.5 126 93

0611 Angelina River Above Sam Rayburn Reservoir PCR1 H PS 125 50 250 5.0 6.0-8.5 126 90

0612 Attoyac Bayou PCR1 H PS 75 50 200 5.0 6.0-8.5 126 90 0613 Lake Tyler/Lake Tyler East PCR1 H PS 50 50 200 5.0 6.5-9.0 126 93 0614 Lake Jacksonville PCR1 H PS 50 75 750 5.0 6.5-9.0 126 93

0615 Angelina River/Sam Rayburn Reservoir PCR1 H PS 150 100 500 5.0 6.5-9.0 126 93

1 The indicator bacteria for freshwater is E. coli and for saltwater is Enterococci.

Neches-Trinity Coastal Basin Designated Uses and Numeric Criteria

Segment No.

Neches-Trinity Coastal Basin Segment Names

Recreation Use

Aquatic Life Use

Domestic Water


Cl-1

(mg/L)

-2SO4

(mg/L) TDS

(mg/L)


pH Range (SU)

Indicator Bacteria1


0701 Taylor Bayou Above Tidal PCR1 I 400 100 1,100 4.0 6.5-9.0 126 95 0702 Intracoastal Waterway Tidal PCR1 H 4.0 6.5-9.0 35 95 0703 Sabine-Neches Canal Tidal PCR1 H 4.0 6.5-9.0 35 95 0704 Hillebrandt Bayou PCR1 I 250 100 600 4.02 6.5-9.0 126 95

1 The indicator bacteria for freshwater is E. coli and for saltwater is Enterococci. 2 The 24-hour minimum dissolved oxygen criterion is 2.5 mg/L.

Trinity River Basin Designated Uses and Numeric Criteria

Segment No.

Trinity River Basin Segment Names

Recreation Use

Aquatic Life Use

Domestic Water


Cl-1

(mg/L)

-2SO4

(mg/L) TDS

(mg/L)


pH Range (SU)

Indicator Bacteria1


0801 Trinity River Tidal PCR1 H 4.0 6.5-9.0 35 95 0802 Trinity River Below Lake Livingston PCR1 H PS 125 100 600 5.0 6.5-9.0 126 93 0803 Lake Livingston PCR1 H PS 150 60 500 5.0 6.5-9.0 126 93 0804 Trinity River Above Lake Livingston PCR1 H 150 150 600 5.0 6.5-9.0 126 93 0805 Upper Trinity River PCR1 H 175 175 850 5.02 6.5-9.0 126 95

0806 West Fork Trinity River Below Lake Worth PCR1 H PS 100 100 500 5.0 6.5-9.0 126 93

0807 Lake Worth PCR1 H PS 100 100 500 5.0 6.5-9.0 126 91

0808 West Fork Trinity River Below Eagle Mountain Reservoir PCR1 H PS 100 100 500 5.0 6.5-9.0 126 91

0809 Eagle Mountain Reservoir PCR1 H PS 75 75 300 5.0 6.5-9.0 126 94

0810 West Fork Trinity River Below Bridgeport Reservoir PCR1 H PS 100 100 500 5.0 6.5-9.0 126 90

0811 Bridgeport Reservoir PCR1 H PS 75 75 300 5.0 6.5-9.0 126 90

0812 West Fork Trinity River Above Bridgeport Reservoir3 PCR1 I PS 190 200 800 3.04 6.5-9.0 126 88

0813 Houston County Lake PCR1 H PS 75 75 300 5.0 6.5-9.0 126 93

0814 Chambers Creek Above Richland-Chambers Reservoir PCR1 H PS 90 160 500 5.0 6.5-9.0 126 90

0815 Bardwell Reservoir PCR1 H PS 50 50 300 5.0 6.5-9.0 126 91 0816 Lake Waxahachie PCR1 H PS 50 50 300 5.0 6.5-9.0 126 91 0817 Navarro Mills Lake PCR1 H PS 50 75 300 5.0 6.5-9.0 126 90 0818 Cedar Creek Reservoir PCR1 H PS 50 100 200 5.0 6.5-9.0 126 93 0819 East Fork Trinity River PCR1 I 100 100 500 4.0 6.5-9.0 126 91 0820 Lake Ray Hubbard PCR1 H PS 100 100 500 5.0 6.5-9.0 126 93 0821 Lavon Lake PCR1 H PS 100 100 500 5.0 6.5-9.0 126 93

0822 Elm Fork Trinity River Below Lewisville Lake PCR1 H PS 80 60 500 5.0 6.5-9.0 126 90

0823 Lewisville Lake PCR1 H PS 80 60 500 5.0 6.5-9.0 126 90

0824 Elm Fork Trinity River Above Ray Roberts Lake PCR1 H PS5 110 90 700 5.0 6.5-9.0 126 90

0825 Denton Creek PCR1 H PS 80 60 500 5.0 6.5-9.0 126 90 0826 Grapevine Lake PCR1 H PS 80 60 500 5.0 6.5-9.0 126 93 0827 White Rock Lake PCR1 H 100 100 400 5.0 6.5-9.0 126 93 0828 Lake Arlington PCR1 H PS 100 100 300 5.0 6.5-9.0 126 95

0829 Clear Fork Trinity River Below Benbrook Lake PCR1 H PS 100 100 500 5.0 6.5-9.0 126 93

0830 Benbrook Lake PCR1 H PS 75 75 300 5.0 6.5-9.0 126 93

0831 Clear Fork Trinity River Below Lake Weatherford PCR1 H PS 100 100 500 5.06 6.5-9.0 126 90

0832 Lake Weatherford PCR1 H PS 100 100 500 5.0 6.5-9.0 126 93

Segment No.

Trinity River Basin Segment Names

Recreation Use

Aquatic Life Use

Domestic Water


Cl-1

(mg/L)

-2SO4

(mg/L) TDS

(mg/L)


pH Range (SU)

Indicator Bacteria1


0833 Clear Fork Trinity River Above Lake Weatherford7 PCR1 I PS 125 125 750 4.08 6.5-9.0 126 95

0834 Lake Amon G. Carter PCR1 H PS 150 150 400 5.0 6.5-9.0 126 93

0835 Richland Creek Below Richland-Chambers Reservoir PCR1 H PS 145 170 500 5.0 6.5-9.0 126 90

0836 Richland-Chambers Reservoir PCR1 H PS 75 110 400 5.0 6.5-9.0 126 91

0837 Richland Creek Above Richland-Chambers Reservoir PCR1 H PS 145 170 500 5.0 6.5-9.0 126 90

0838 Joe Pool Lake PCR1 H PS 100 250 500 5.0 6.5-9.0 126 90

0839 Elm Fork Trinity River Below Ray Roberts Lake PCR1 H PS 80 60 500 5.0 6.5-9.0 126 90

0840 Ray Roberts Lake PCR1 H PS 80 60 500 5.0 6.5-9.0 126 90 0841 Lower West Fork Trinity River PCR1 I 175 175 850 4.09 6.5-9.0 126 95

1 The indicator bacteria for freshwater is E. coli and for saltwater is Enterococci. 2 The dissolved oxygen criterion is 3.5 mg/L when headwater flow at USGS Gaging Station 08048000 (located on the

West Fork Trinity River in Fort Worth) is less than 80 cfs. 3 The segment is an intermittent stream with perennial pools. 4 The 24-hour minimum dissolved oxygen criterion is 2.0 mg/L. 5 The public water supply use does not apply from a point 9.5 km (5.9 mi) downstream of the confluence of Pecan

Creek in Cooke County up to FM 373 in Cooke County. 6 A 24-hour average dissolved oxygen criterion of 3.0 mg/L and minimum dissolved oxygen criterion of 2.0 mg/L

applies from the confluence with an unnamed tributary approximately 1.0 mi downstream of Weatherford Dam upstream to Weatherford Dam.

7 The segment is an intermittent stream with perennial pools. 8 The 24-hour minimum dissolved oxygen criterion is 2.0 mg/L. A 24-hour average dissolved oxygen criterion of 2.0

mg/L and a 24-hour minimum dissolved oxygen criterion of 1.0 mg/L apply when flows are less than 1.0 cfs. 9 The dissolved oxygen criterion is 2.5 mg/L when headwater flow at USGS Gaging Station 08048000 (located on the

West Fork Trinity River in Fort Worth) is less than 80.0 cfs.

Trinity-San Jacinto Coastal Basin Designated Uses and Numeric Criteria

Segment No.

Trinity-San Jacinto Coastal Basin Segment Names

Recreation Use

Aquatic Life Use

Domestic Water


Cl-1

(mg/L)

-2SO4

(mg/L) TDS

(mg/L)


pH Range (SU)

Indicator Bacteria1

#/100 mL

Temperature (degrees F)

0901 Cedar Bayou Tidal PCR1 H 4.0 6.5-9.0 35 95 0902 Cedar Bayou Above Tidal PCR1 H 200 150 700 5.0 6.5-9.0 126 90


San Jacinto River Basin Designated Uses and Numeric Criteria

Segment No.

San Jacinto River Basin Segment Names

Recreation Use

Aquatic Life Use

Domestic Water


Cl-1

(mg/L)

-2SO4

(mg/L) TDS

(mg/L)


pH Range (SU)

Indicator Bacteria1


1001 San Jacinto River Tidal PCR1 H 4.0 6.5-9.0 35 95 1002 Lake Houston PCR1 H PS 100 50 400 5.0 6.5-9.0 126 90 1003 East Fork San Jacinto River PCR1 H PS 80 50 400 5.0 6.0-8.5 126 91 1004 West Fork San Jacinto River PCR1 H PS 100 50 400 5.0 6.5-9.0 126 95

1005 Houston Ship Channel/San Jacinto River Tidal NCR H 4.0 6.5-9.0 35 95

10062 Houston Ship Channel Tidal N/IS 2.0 6.5-9.0 168 95

10072

Houston Ship Channel/Buffalo Bayou Tidal N/IS 1.0 6.5-9.0 168 95

1008 Spring Creek PCR1 H PS 100 50 450 5.03 6.5-9.0 126 90 1009 Cypress Creek PCR1 H PS 100 50 600 5.0 6.5-9.0 126 90 1010 Caney Creek PCR1 H PS 50 50 300 5.0 6.0-8.5 126 90 1011 Peach Creek PCR1 H PS 50 50 300 5.0 6.0-8.5 126 90 1012 Lake Conroe PCR1 H PS 50 50 300 5.0 6.5-9.0 126 90 1013 Buffalo Bayou Tidal PCR1 I 3.0 6.5-9.0 35 92 1014 Buffalo Bayou Above Tidal PCR1 L 110 65 600 3.0 6.5-9.0 126 92 1015 Lake Creek PCR1 H PS 80 50 300 5.0 6.0-8.5 126 90 1016 Greens Bayou Above Tidal PCR1 L 150 150 1,000 3.0 6.5-9.0 126 92 1017 Whiteoak Bayou Above Tidal PCR1 L 110 65 600 3.0 6.5-9.0 126 92

1 The indicator bacteria for freshwater is E. coli and for saltwater is Enterococci. 2 Chronic numerical toxic criteria, chronic total toxicity requirements, and numerical toxic criteria applicable t o

sustainable fisheries apply to the segment. 3 A 24-hou r average dissolv ed oxyg en criterio n of 4.0 mg/L and a 24-hour minimum dissol ved oxyg en criterio n o f

3.0 mg/L apply from the confluence with Mill Creek imme diately downstream o f Neidigk Lake, upstream to the confluence with Kick apoo Creek from July through September.

San Jacinto-Brazos Coastal Basin Designated Uses and Numeric Criteria

Segment No.

San Jacinto-Brazos Coastal Basin Segment Names

Recreation Use

Aquatic Life Use

Domestic Water


Cl-1

(mg/L)

-2SO4

(mg/L) TDS

(mg/L)


pH Range (SU)

Indicator Bacteria1


1101 Clear Creek Tidal PCR1 H 4.0 6.5-9.0 35 95 1102 Clear Creek Above Tidal PCR1 H 200 100 600 5.0 6.5-9.0 126 95 1103 Dickinson Bayou Tidal PCR1 H 4.0 6.5-9.0 35 95 1104 Dickinson Bayou Above Tidal PCR1 I 200 100 600 4.0 6.5-9.0 126 90 1105 Bastrop Bayou Tidal PCR1 H 4.0 6.5-9.0 35 95 1107 Chocolate Bayou Tidal PCR1 H 4.0 6.5-9.0 35 95 1108 Chocolate Bayou Above Tidal PCR1 H 200 100 900 5.0 6.5-9.0 126 90 1109 Oyster Creek Tidal PCR1 H 4.0 6.5-9.0 35 95 1110 Oyster Creek Above Tidal PCR1 H 300 150 750 5.0 6.5-9.0 126 90 1111 Old Brazos River Channel Tidal PCR1 H 4.0 6.5-9.0 35 95 1113 Armand Bayou Tidal PCR1 H 4.0 6.5-9.0 35 95


Brazos River Basin Designated Uses and Numeric Criteria

Segment No.

Brazos River Basin Segment Names

Recreation Use

Aquatic Life Use

Domestic Water


Cl-1

(mg/L)

-2SO4

(mg/L) TDS

(mg/L)


pH Range (SU)

Indicator Bacteria1


1201 Brazos River Tidal PCR1 H PS2 4.0 6.5-9.0 35 95 1202 Brazos River Below Navasota River PCR1 H PS 300 200 750 5.0 6.5-9.0 126 95 1203 Whitney Lake PCR1 H PS 670 320 1,500 5.0 6.5-9.0 126 93 1204 Brazos River Below Lake Granbury PCR1 H 750 380 1,600 5.0 6.5-9.0 126 91 1205 Lake Granbury PCR1 H PS 1,000 600 2,500 5.0 6.5-9.0 126 93

1206 Brazos River Below Possum Kingdom Lake PCR1 H 1,036 595 2,325 5.0 6.5-9.0 126 90

1207 Possum Kingdom Lake PCR1 H PS 1,200 500 3,500 5.0 6.5-9.0 126 93

1208 Brazos River Above Possum Kingdom Lake PCR1 H 5,000 2,000 12,000 5.0 6.5-9.0 33 95

1209 Navasota River Below Lake Limestone PCR1 H PS 140 100 600 5.0 6.5-9.0 126 93

1210 Lake Mexia PCR1 H PS 100 50 400 5.0 6.5-9.0 126 90 1211 Yegua Creek PCR1 H PS 140 130 640 5.0 6.5-9.0 126 91 1212 Somerville Lake PCR1 H PS 100 100 400 5.0 6.5-9.0 126 93 1213 Little River PCR1 H PS 75 75 400 5.0 6.5-9.0 126 90 1214 San Gabriel River PCR1 H PS 50 45 550 5.0 6.5-9.0 126 91

1215 Lampasas River Below Stillhouse Hollow Lake PCR1 H PS 100 75 500 5.0 6.5-9.0 126 91

1216 Stillhouse Hollow Lake PCR1 E PS 100 75 500 6.0 6.5-9.0 126 93

1217 Lampasas River Above Stillhouse Hollow Lake PCR1 H 500 100 1,200 5.0 6.5-9.0 126 91

1218 Nolan Creek/South Nolan Creek PCR1 H 100 75 500 5.0 6.5-9.0 126 93 1219 Leon River Below Belton Lake PCR1 H PS 150 75 500 5.0 6.5-9.0 126 91 1220 Belton Lake PCR1 H PS 100 75 500 5.0 6.5-9.0 126 93 1221 Leon River Below Proctor Lake PCR1 H PS 150 100 900 5.0 6.5-9.0 126 90 1222 Proctor Lake PCR1 H PS 200 75 500 5.0 6.5-9.0 126 93 1223 Leon River Below Leon Reservoir PCR1 H PS 480 130 1,240 5.0 6.5-9.0 126 93 1224 Leon Reservoir PCR1 H PS 150 75 500 5.0 6.5-9.0 126 93 1225 Waco Lake PCR1 H PS 60 60 400 5.0 6.5-9.0 126 93 1226 North Bosque River PCR1 H PS 100 100 540 5.0 6.5-9.0 126 91 1227 Nolan River PCR1 I 372 320 1,383 4.0 6.5-9.0 126 95 1228 Lake Pat Cleburne PCR1 H PS 100 100 300 5.0 6.5-9.0 126 93 1229 Paluxy River/North Paluxy River PCR1 H PS 50 100 500 5.0 6.5-9.0 126 91 1230 Lake Palo Pinto PCR1 H PS 100 100 450 5.0 6.5-9.0 126 93 1231 Lake Graham PCR1 H PS 200 75 500 5.0 6.5-9.0 126 95 1232 Clear Fork Brazos River PCR1 H 1,250 2,200 4,900 5.0 6.5-9.0 126 93 1233 Hubbard Creek Reservoir PCR1 H PS 350 150 900 5.0 6.5-9.0 126 93 1234 Lake Cisco PCR1 H PS 75 75 350 5.0 6.5-9.0 126 93 1235 Lake Stamford PCR1 H PS 580 400 2,100 5.0 6.5-9.0 126 93 1236 Fort Phantom Hill Reservoir PCR1 H PS 130 150 550 5.0 6.5-9.0 126 93 1237 Lake Sweetwater PCR1 H PS 250 225 730 5.0 6.5-9.0 126 93

Segment No.

Brazos River Basin Segment Names

Recreation Use

Aquatic Life Use

Domestic Water


Cl-1

(mg/L)

-2SO4

(mg/L) TDS

(mg/L)


pH Range (SU)

Indicator Bacteria1


1238 Salt Fork Brazos River PCR1 H 28,060 3,470 54,350 5.0 6.5-9.0 33 93 1239 White River PCR1 H PS 100 100 500 5.0 6.5-9.0 126 92 1240 White River Lake PCR1 H PS 190 90 780 5.0 6.5-9.0 126 89 1241 Double Mountain Fork Brazos River PCR1 H 2,630 2,400 5,500 5.0 6.5-9.0 33 95 1242 Brazos River Above Navasota River PCR1 H PS 350 200 1,000 5.0 6.5-9.0 126 95 1243 Salado Creek3 PCR1 H PS/AP4 50 50 400 5.0 6.5-9.0 126 90 1244 Brushy Creek PCR1 H PS/AP4 200 150 800 5.0 6.5-9.0 126 91 1245 Upper Oyster Creek PCR1 I PS5 140 75 1,070 4.06 6.5-9.0 126 95 1246 Middle Bosque/South Bosque River PCR1 H 50 260 700 5.0 6.5-9.0 126 91 1247 Granger Lake PCR1 H PS 50 50 400 5.0 6.5-9.0 126 90

1248 San Gabriel/North Fork San Gabriel River

PCR1 H PS/AP4 50 50 400 5.0 6.5-9.0 126 95

1249 Lake Georgetown PCR1 H PS/AP4 50 50 350 5.0 6.5-9.0 126 90 1250 South Fork San Gabriel River PCR1 H PS/AP4 50 50 350 5.0 6.5-9.0 126 95 1251 North Fork San Gabriel River PCR1 H PS/AP4 50 50 400 5.0 6.5-9.0 126 91 1252 Lake Limestone PCR1 H PS 50 50 300 5.0 6.5-9.0 126 90 1253 Navasota River Below Lake Mexia PCR1 H PS 440 150 1,350 5.0 6.5-9.0 126 93 1254 Aquilla Reservoir PCR1 H PS 110 310 600 5.0 6.5-9.0 126 90 1255 Upper North Bosque River PCR1 I 200 150 1,000 4.0 6.5-9.0 126 91 1256 Brazos River/Lake Brazos PCR1 H PS 400 200 1,150 5.0 6.5-9.0 126 95

1257 Brazos River Below Whitney Lake PCR1 H PS 450 250 1,450 5.0 6.5-9.0 126 95

1258 Middle Oyster Creek PCR1 H 300 150 750 5.0 6.5-9.0 126 95

1259 Leon River Above Belton Lake PCR1 H PS 150 100 900 5.0 6.5-9.0 126 90

1 The indicator bacteria for freshwater is E. coli and for saltwater is Enterococci. The indicator bacteria for Segments 1208, 1238, and 1241 is Enterococci.

2 The public water supply designation only applies from the upstream boundary to 300 meters (330 yards) downstream of SH 332 in Brazoria County.

3 The critical low-flow is calculated according to §307.8(a)(2)(B) of this title. 4 The aquifer protection use applies to the contributing, recharge, and transition zones of the Edwards Aquifer. 5 The public water supply use does not apply from Steep Bank Creek/Brazos River confluence upstream to Dam #3

approximately 0.4 mi downstream from the confluence of the American Canal. 6 A 24-hour minimum dissolved oxygen criterion of 1.0 mg/L applies from the confluence with Steep Bank

Creek/Brazos River upstream to Dam #3.

Brazos-Colorado Coastal Basin Designated Uses and Numeric Criteria

Segment No.

Brazos-Colorado Coastal Basin Segment Names

Recreation Use

Aquatic Life Use

Domestic Water


Cl-1

(mg/L)

-2SO4

(mg/L) TDS

(mg/L)


pH Range (SU)

Indicator Bacteria1


1301 San Bernard River Tidal PCR1 H 4.0 6.5-9.0 35 95 1302 San Bernard River Above Tidal PCR1 H PS 200 100 500 5.0 6.5-9.0 126 90 1304 Caney Creek Tidal PCR1 H 4.0 6.5-9.0 35 95 1305 Caney Creek Above Tidal PCR1 H 200 75 1,000 5.02 6.5-9.0 126 90

1 The indicator bacteria for freshwater is E. coli and for saltwater is Enterococci. 2 A 24-hou r average dissolv ed oxyg en criterio n of 4.0 mg/L and a 24-hour minimum dissol ved oxyg en criterio n o f

3.0 mg/L applies from the confluenc e with Hardeman Slough upstream to the confluence with Water Hole Creek. A 24-hou r average dissolv ed oxyg en criterion 2.5 mg/L and a 24-hour minimum dissolv ed oxyg en criterio n of 2. 0 mg/L applies from the confluence with Hardeman Slough upstream to the confluence with Water Ho le Creek from March 15 - October 31 when flows are less th an 5. 0 cfs.

Colorado River Basin Designated Uses and Numeric Criteria

Segment No.

Colorado River Basin Segment Names

Recreation Use

Aquatic Life Use

Domestic Water


Cl-1

(mg/L)

-2SO4

(mg/L) TDS

(mg/L)


pH Range (SU)

Indicator Bacteria1


1401 Colorado River Tidal PCR1 H 4.0 6.5-9.0 35 95 1402 Colorado River Below La Grange PCR1 H PS 100 100 500 5.0 6.5-9.0 126 95 1403 Lake Austin PCR1 H PS 100 75 400 5.0 6.5-9.0 126 90 1404 Lake Travis PCR1 E PS 100 75 400 6.0 6.5-9.0 126 90 1405 Marble Falls Lake PCR1 H PS 125 75 500 5.0 6.5-9.0 126 94 1406 Lake Lyndon B. Johnson PCR1 H PS 125 75 500 5.0 6.5-9.0 126 94 1407 Inks Lake PCR1 H PS 150 100 600 5.0 6.5-9.0 126 90 1408 Lake Buchanan PCR1 H PS 150 100 600 5.0 6.5-9.0 126 90 1409 Colorado River Above Lake Buchanan PCR1 H PS 200 200 900 5.0 6.5-9.0 126 91

1410 Colorado River Below O. H. Ivie Reservoir PCR1 H PS 500 455 1,475 5.0 6.5-9.0 126 91

1411 E. V. Spence Reservoir PCR1 H PS 440 360 1,630 5.0 6.5-9.0 126 93

1412 Colorado River Below Lake J. B. Thomas PCR1 H 4,740 1,570 9,210 5.0 6.5-9.0 33 93

1413 Lake J. B. Thomas PCR1 H PS 140 250 520 5.0 6.5-9.0 126 90 1414 Pedernales River PCR1 H PS 125 75 525 5.0 6.5-9.0 126 91 1415 Llano River2 PCR1 H PS 50 50 350 5.0 6.5-9.0 126 91 1416 San Saba River PCR1 H PS 50 50 425 5.0 6.5-9.0 126 90 1417 Lower Pecan Bayou PCR1 H 310 120 1,025 5.0 6.5-9.0 126 90 1418 Lake Brownwood PCR1 H PS 150 100 500 5.0 6.5-9.0 126 90 1419 Lake Coleman PCR1 H PS 150 100 500 5.0 6.5-9.0 126 93 1420 Pecan Bayou Above Lake Brownwood PCR1 H PS 500 500 1,500 5.0 6.5-9.0 126 90 1421 Concho River PCR1 H PS 610 420 1,730 5.0 6.5-9.0 126 90 1422 Lake Nasworthy PCR1 H PS 450 400 1,500 5.0 6.5-9.0 126 93 1423 Twin Buttes Reservoir PCR1 H PS 200 100 700 5.0 6.5-9.0 126 90 1424 Middle Concho/South Concho River3 PCR1 H PS 150 150 700 5.0 6.5-9.0 126 90 1425 O. C. Fisher Lake PCR1 H PS 150 150 700 5.0 6.5-9.0 126 90

1426 Colorado River Below E.V. Spence Reservoir PCR1 H PS 1,000 1,100 1,770 5.0 6.5-9.0 126 91

1427 Onion Creek PCR1 H PS/AP4 1005 1005 5005 5.0 6.5-9.0 126 90

1428 Colorado River Below Lady Bird Lake/Town Lake PCR1 E PS 100 100 500 6.06 6.5-9.0 126 95

1429 Lady Bird Lake/Town Lake7 PCR1 H PS 75 75 400 5.0 6.5-9.0 126 90 1430 Barton Creek8 PCR1 H AP4 50 50 500 5.0 6.5-9.0 126 90 1431 Mid Pecan Bayou PCR1 410 120 1,100 2.0 6.5-9.0 126 90 1432 Upper Pecan Bayou PCR1 H PS 200 150 800 5.0 6.5-9.0 126 90 1433 O. H. Ivie Reservoir PCR1 H PS 430 330 1,520 5.0 6.5-9.0 126 93 1434 Colorado River Above La Grange PCR1 E PS 100 100 500 6.0 6.5-9.0 126 95

1 The indicator bacteria for freshwater is E. coli and for saltwater is Enterococci. The indicator bacteria for Segment

1412 is Enterococci. 2 The critical low-flow for the South Llano River portio n o f the segment is calculated according t o §307.8(a)(2)(B) of

this title. 3 The critical low-flow for the So uth Co ncho Ri ver portio n of the segment is calculated according to §307.8(a)(2)(B )

of this title. 4 The aquifer protection use applies to the contributing, recharge, and transition zones of the Edwards Aquifer. 5 The aquifer protection reach is assigned the following criteria: 50 mg/L for Cl-1, 50 mg/L for SO -2

4 , 400 mg/L for TDS.

6 Dissolved oxyge n criterion of 6.0 mg/L only applies at stream flows greater th an or equal to 150 cfs as measured at USGS Gauging Station 08158000 located in Travis County upstream from US Highway 183. A dissolved oxyge n criterion of 5.0 mg/L applies to stream flows less than 150 cfs and greater than or equal to the 7Q2 for the segment.

7 While the segment exhi bits quali ty characteristics tha t would make it suitable fo r pr imary recreation, the us e is prohibited by local regulatio n fo r reasons unrelated to water quality.

8 The critical low-flow is calculat ed according to §307.8(a)(2)(A) of this titl e.

Colorado-Lavaca Coastal Basin Designated Uses and Numeric Criteria

Segment No.

Colorado-Lavaca Coastal Basin Segment Names

Recreation Use

Aquatic Life Use

Domestic Water


Cl-1

(mg/L)

-2SO4

(mg/L) TDS

(mg/L)


pH Range (SU)

Indicator Bacteria1


1501 Tres Palacios Creek Tidal PCR1 E 5.0 6.5-9.0 35 95 1502 Tres Palacios Creek Above Tidal PCR1 H 250 100 800 5.0 6.5-9.0 126 90


Lavaca River Basin Designated Uses and Numeric Criteria

Segment No.

Lavaca River Basin Segment Names

Recreation Use

Aquatic Life Use

Domestic Water


Cl-1

(mg/L)

-2SO4

(mg/L) TDS

(mg/L)


pH Range (SU)

Indicator Bacteria1


1601 Lavaca River Tidal PCR1 H 4.0 6.5-9.0 35 95 1602 Lavaca River Above Tidal PCR1 H PS 200 100 700 5.0 6.5-9.0 126 91 1603 Navidad River Tidal PCR1 H 4.0 6.5-9.0 35 91 1604 Lake Texana PCR1 H PS 100 50 500 5.0 6.5-9.0 126 93 1605 Navidad River Above Lake Texana PCR1 H PS 100 50 550 5.0 6.5-9.0 126 91


Lavaca-Guadalupe Coastal Basin Designated Uses and Numeric Criteria

Segment No.

Lavaca-Guadalupe Coastal Basin Segment Names

Recreation Use

Aquatic Life Use

Domestic Water


Cl-1

(mg/L)

-2SO4

(mg/L) TDS

(mg/L)


pH Range (SU)

Indicator Bacteria1


1701 Victoria Barge Canal Tidal NCR H 4.0 6.5-9.0 35 95


Guadalupe River Basin Designated Uses and Numeric Criteria

Segment No.

Guadalupe River Basin Segment Names

Recreation Use

Aquatic Life Use

Domestic Water


Cl-1

(mg/L)

-2SO4

(mg/L) TDS

(mg/L)


pH Range (SU)

Indicator Bacteria1


1801 Guadalupe River Tidal PCR1 E 5.0 6.5-9.0 35 95

1802 Guadalupe River Below San Antonio River PCR1 H PS 150 100 700 5.0 6.5-9.0 126 93

1803 Guadalupe River Below San Marcos River PCR1 H PS 100 100 500 5.0 6.5-9.0 126 93

1804 Guadalupe River Below Comal River PCR1 H PS/AP2 100 50 400 5.0 6.5-9.0 126 90 1805 Canyon Lake PCR1 E PS/AP2 50 50 400 6.0 6.5-9.0 126 90 1806 Guadalupe River Above Canyon Lake PCR1 E PS/AP2 50 50 400 6.0 6.5-9.0 126 90 1807 Coleto Creek PCR1 H PS 250 100 500 5.0 6.5-9.0 126 93 1808 Lower San Marcos River3 PCR1 H PS 60 50 400 5.0 6.5-9.0 126 90 1809 Lower Blanco River PCR1 H PS/AP2 50 50 400 5.0 6.5-9.0 126 92 1810 Plum Creek PCR1 H AP2 350 150 1,120 5.0 6.5-9.0 126 90 1811 Comal River4 PCR1 H PS/AP2 50 50 400 5.0 6.5-9.0 126 805

1812 Guadalupe River Below Canyon Dam PCR1 E PS/AP2 50 50 400 6.0 6.5-9.0 126 90 1813 Upper Blanco River3 PCR1 E PS/AP2 50 50 400 6.0 6.5-9.0 126 92 1814 Upper San Marcos River4 PCR1 E AP2 50 50 400 6.0 6.5-9.0 126 806

1815 Cypress Creek PCR1 E PS/AP2 50 50 400 6.0 6.5-9.0 126 86 1816 Johnson Creek PCR1 E PS 50 50 400 6.0 6.5-9.0 126 86 1817 North Fork Guadalupe River3 PCR1 E PS 50 50 400 6.0 6.5-9.0 126 86 1818 South Fork Guadalupe River PCR1 E PS 50 50 400 6.0 6.5-9.0 126 86

1 The indicator bacteria for freshwater is E. coli and for saltwater is Enterococci. 2 The aquifer protection use applies to the contributing, recharge, and transition zones of the Edwards Aquifer. 3 The critical low-flow is calculat ed acco rding to §307.8(a)(2)(B ) of this title. 4 The critical low-flow is calculat ed according to §307.8(a)(2)(A) of this titl e. 5 A temperature criterion of 78ºF applies from the Landa Lake Park Dam immediately upstream of Landa Park Drive

upstream to Klingemann Street i n New Braunfels i n Comal County (excludes the western channel at Spring Island, the eastern channel at Pecan Island, and Blieders Creek arm of Landa Lake upstream of the springs in the upper spring run reach).

6 A temperature criterion of 78ºF applies from the confluence with Sessom 's Creek approximately 1. 5 km (0.9 mi) upstream of Rio Vista Dam upstream to a point 0.7 km (0.4 mi) upstream of Lo op 82 in San Marcos in Hay s County (excludes the slough arm of Spring Lake).

San Antonio River Basin Designated Uses and Numeric Criteria

Segment No.

San Antonio River Basin Segment Names

Recreation Use

Aquatic Life Use

Domestic Water


Cl-1

(mg/L)

-2SO4

(mg/L) TDS

(mg/L)


pH Range (SU)

Indicator Bacteria1


1901 Lower San Antonio River PCR1 H 180 140 750 5.0 6.5-9.0 126 90 1902 Lower Cibolo Creek PCR1 H 170 275 900 5.0 6.5-9.0 126 90

1903 Medina River Below Medina Diversion Lake PCR1 H PS2/AP3 120 120 700 5.0 6.5-9.0 126 90

1904 Medina Lake PCR1 H PS/AP3 80 75 350 5.0 6.5-9.0 126 88 1905 Medina River Above Medina Lake4 PCR1 E PS 50 150 400 6.0 6.5-9.0 126 88 1906 Lower Leon Creek PCR1 H PS5 120 120 700 5.0 6.5-9.0 126 95 1907 Upper Leon Creek PCR1 H PS/AP3 55 240 550 5.0 6.5-9.0 126 95 1908 Upper Cibolo Creek PCR1 H PS/AP3 50 100 600 5.0 6.5-9.0 126 90 1909 Medina Diversion Lake PCR1 H PS/AP3 50 75 400 5.0 6.5-9.0 126 90 1910 Salado Creek PCR1 H PS/AP3 140 200 600 5.0 6.5-9.0 126 90 1911 Upper San Antonio River PCR1 H 150 150 750 5.0 6.5-9.0 126 90 1912 Medio Creek PCR1 I 150 150 750 4.0 6.5-9.0 126 95 1913 Mid Cibolo Creek6 PCR1 L 150 150 750 3.0 6.5-9.0 126 90

1 The indicator bacteria for freshwater is E. coli. 2 The public water supply designation does not apply from th e confluenc e of the San Antonio River in Bexa r Coun ty

up stream to a point 2.5 km (1.5 mi) upstream of th e confluenc e of Leo n Creek. 3 The aquifer protection use applies to the contributing, recharge, and transition zones of the Edwards Aquifer. 4 The critical low-flow is calculat ed acco rding to §307.8(a)(2)(B) of this title. 5 The public water supply designat ion does not appl y from the confluence of the Medina River in Bexar County to a

point 4.8 km (3.0 mi) upstream. 6 The segment is an intermittent stream with perennial pools.

San Antonio-Nueces Coastal Basin Designated Uses and Numeric Criteria

Segment No.

San Antonio-Nueces Coastal Basin Segment Names

Recreation Use

Aquatic Life Use

Domestic Water


Cl-1

(mg/L)

-2SO4

(mg/L) TDS

(mg/L)


pH Range (SU)

Indicator Bacteria1


2001 Mission River Tidal PCR1 H 4.0 6.5-9.0 35 95 2002 Mission River Above Tidal PCR1 H 850 100 2,000 5.0 6.5-9.0 126 95 2003 Aransas River Tidal PCR1 H 4.0 6.5-9.0 35 95 2004 Aransas River Above Tidal PCR1 H 450 100 1,700 5.0 6.5-9.0 126 95


Nueces River Basin Designated Uses and Numeric Criteria

Segment No.

Nueces River Basin Segment Names

Recreation Use

Aquatic Life Use

Domestic Water


Cl-1

(mg/L)

-2SO4

(mg/L) TDS

(mg/L)


pH Range (SU)

Indicator Bacteria1


2101 Nueces River Tidal PCR1 H 4.0 6.5-9.0 35 95

2102 Nueces River Below Lake Corpus Christi PCR1 H PS 250 250 500 5.0 6.5-9.0 126 91

2103 Lake Corpus Christi PCR1 H PS 250 250 750 5.0 6.5-9.0 126 93 2104 Nueces River Above Frio River PCR1 H PS 700 300 1,500 5.0 6.5-9.0 126 90 2105 Nueces River Above Holland Dam PCR1 H PS 200 200 900 5.0 6.5-9.0 126 90 2106 Nueces/Lower Frio River PCR1 H PS 2852 1452 7352 5.0 6.5-9.0 126 90 2107 Lower Atascosa River PCR1 H PS 400 300 1,650 4.0 6.5-9.0 126 90 2108 San Miguel Creek PCR1 H PS 700 700 2,000 5.0 6.5-9.0 126 95 2109 Leona River3 PCR1 H PS/AP4 650 500 2,000 5.0 6.5-9.0 126 90 2110 Lower Sabinal River PCR1 H PS 200 100 700 5.0 6.5-9.0 126 90 2111 Upper Sabinal River PCR1 H PS/AP4 50 75 500 5.0 6.5-9.0 126 90 2112 Upper Nueces River PCR1 H PS/AP4 50 50 400 5.0 6.5-9.0 126 90 2113 Upper Frio River3 PCR1 E PS/AP4 50 50 400 6.0 6.5-9.0 126 90 2114 Hondo Creek PCR1 H PS/AP4 50 100 400 5.0 6.5-9.0 126 90 2115 Seco Creek PCR1 H PS/AP4 50 70 400 5.0 6.5-9.0 126 90 2116 Choke Canyon Reservoir PCR1 H PS 250 250 720 5.0 6.5-9.0 126 90

2117 Frio River Above Choke Canyon Reservoir PCR1 H PS/AP4 620 380 1,700 5.0 6.5-9.0 126 90

2118 Upper Atascosa River PCR1 I 350 700 1,550 4.0 6.5-9.0 126 90

1 The indicator bacteria for freshwater is E. coli and for saltwater is Enterococci. 2 A TDS criter ion of 735 mg/L, a Cl-1 criterion of 285 mg/L, and a SO -2

4 criterion of 145 mg/L will apply for the Fri o River po rtion of the segment from the confluence of the Nueces River upstre am to Choke Canyon Dam. A TDS criterion of 950 mg/L, a Cl-1 criterio n of 35 0 mg/L, and a SO -2

4 criterion of 165 mg/L will apply for the Nueces River po rtion of the segment from a point 100 meters upstream of US 59 in Live Oak County upstream to the confluence of the Frio River. A site-speci fic conversion factor of 0.58 was used t o calculate the TDS criteria.

3 The critical low-flow is calculat ed in accordance with §307.8(a)(2)(B) of this title. 4 The aquifer protection use applies to the contributing, recharge, and transition zones of the Edwards Aquifer.

Nueces-Rio Grande Coastal Basin Designated Uses and Numeric Criteria

Segment No.

Nueces-Rio Grande Coastal Basin Segment Names

Recreation Use

Aquatic Life Use

Domestic Water


Cl-1

(mg/L)

-2SO4

(mg/L) TDS

(mg/L)


pH Range (SU)

Indicator Bacteria1


2201 Arroyo Colorado Tidal PCR1 H 4.0 6.5-9.0 35 95 2202 Arroyo Colorado Above Tidal PCR1 I 1,200 1,000 4,000 4.0 6.5-9.0 126 95 2203 Petronila Creek Tidal PCR1 H 4.0 6.5-9.0 35 95 2204 Petronila Creek Above Tidal2 PCR1 I 1,500 500 4,000 4.0 6.5-9.0 126 95

1 The indicator bacteria for freshwater is E. coli and for saltwater is Enterococci. 2 High concentrations of Cl-1, SO -2

4 , and TDS are due t o past brine discharges that were halted effective January 10, 1987 b y order of the Texas Railroad Commission. Water quality is expected to improve as residual brines are flushed from the system. These estimated criteria are subjec t to modification as improvement in water quality is documented.

Rio Grande Basin Designated Uses and Numeric Criteria Segment

No. Rio Grande Basin Segment Names

Recreation Use

Aquatic Life Use

Domestic Water

Supply Use

Other Uses

Cl-1

(mg/L)

-2SO4

(mg/L) TDS

(mg/L) Dissolved Oxygen (mg/L)

pH Range (SU)

Indicator Bacteria1

#/100 mL

Temperature (degrees F)

2301 Rio Grande Tidal PCR1 E 5.0 6.5-9.0 35 95 2302 Rio Grande Below Falcon Reservoir PCR1 H PS 270 350 880 5.0 6.5-9.0 126 90 2303 International Falcon Reservoir PCR1 H PS 200 300 1,000 5.0 6.5-9.0 126 93 2304 Rio Grande Below Amistad

Reservoir PCR1 H PS 200 300 1,000 5.0 6.5-9.0 126 95

2305 International Amistad Reservoir PCR1 H PS 150 270 800 5.0 6.5-9.0 126 88 2306 Rio Grande Above Amistad

Reservoir PCR1 H PS 200 450 1,400 5.0 6.5-9.0 126 93

2307 Rio Grande Below Riverside Diversion Dam

PCR1 H PS 300 550 1,500 5.0 6.5-9.0 126 93

2308 Rio Grande Below International Dam NCR L 250 450 1,400 3.0 6.5-9.0 605 95 2309 Devils River2 PCR1 E PS 50 50 300 6.0 6.5-9.0 126 90 2310 Lower Pecos River PCR1 H PS 1,700 1,000 4,000 5.0 6.5-9.0 126 92 2311 Upper Pecos River PCR1 L 7,000 3,500 15,000 5.03 6.5-9.0 33 92 2312 Red Bluff Reservoir PCR1 H 3,200 2,200 9,400 5.0 6.5-9.0 33 90 2313 San Felipe Creek2 PCR1 H PS 50 50 400 5.0 6.5-9.0 126 90 2314 Rio Grande Above International

Dam PCR1 H PS 340 600 1,800 5.0 6.5-9.0 126 92

2315 Rio Grande Below Rio Conchos PCR1 H 450 750 2,100 5.0 6.5-9.0 126 93

1 The indicator bacteria for freshwater is E. coli and for saltwater is Enterococci. The indicator bacteria for Segments 2311 and 2312 is Enterococci.

2 The critical low-flow is calculated in accordance with §307.8(a)(2)(A) of this title. 3 The 24-hour minimum dissolved oxygen criterion is 1.0 mg/L.

Bays and Estuaries Uses and Numeric Criteria

Segment No.

Bays and Estuaries Segment Names

Recreation Use

Aquatic Life Use

Domestic Water


Cl-1

(mg/L)

-2SO4

(mg/L) TDS

(mg/L)


pH Range (SU)

Indicator Bacteria1


2411 Sabine Pass PCR1 E/O 5.0 6.5-9.0 35/14 95 2412 Sabine Lake PCR1 H/O 4.0 6.5-9.0 35/14 95 2421 Upper Galveston Bay PCR1 H/O 4.0 6.5-9.0 35/14 95 2422 Trinity Bay PCR1 H/O 4.0 6.5-9.0 35/14 95 2423 East Bay PCR1 H/O 4.0 6.5-9.0 35/14 95 2424 West Bay PCR1 H/O 4.0 6.5-9.0 35/14 95 2425 Clear Lake PCR1 H 4.0 6.5-9.0 35 95 2426 Tabbs Bay PCR1 H 4.0 6.5-9.0 35 95 2427 San Jacinto Bay PCR1 H 4.0 6.5-9.0 35 95 2428 Black Duck Bay PCR1 H 4.0 6.5-9.0 35 95 2429 Scott Bay PCR1 H 4.0 6.5-9.0 35 95 2430 Burnet Bay PCR1 H 4.0 6.5-9.0 35 95 2431 Moses Lake PCR1 H 4.0 6.5-9.0 35 95 2432 Chocolate Bay PCR1 H/O 4.0 6.5-9.0 35/14 95 2433 Bastrop Bay/Oyster Lake PCR1 H/O 4.0 6.5-9.0 35/14 95 2434 Christmas Bay PCR1 H/O 4.0 6.5-9.0 35/14 95 2435 Drum Bay PCR1 H/O 4.0 6.5-9.0 35/14 95 2436 Barbours Cut PCR1 H 4.0 6.5-9.0 35 95 2437 Texas City Ship Channel NCR H 4.0 6.5-9.0 35 95 2438 Bayport Channel NCR H 4.0 6.5-9.0 35 95 2439 Lower Galveston Bay PCR1 H/O 4.0 6.5-9.0 35/14 95 2441 East Matagorda Bay PCR1 E/O 5.0 6.5-9.0 35/14 95 2442 Cedar Lakes PCR1 H/O 4.0 6.5-9.0 35/14 95 2451 Matagorda Bay/Powderhorn Lake PCR1 E/O 5.0 6.5-9.0 35/14 95 2452 Tres Palacios/Turtle Bay PCR1 E/O 5.0 6.5-9.0 35/14 95 2453 Lavaca Bay/Chocolate Bay PCR1 E/O 5.0 6.5-9.0 35/14 95 2454 Cox Bay PCR1 E/O 5.0 6.5-9.0 35/14 95 2455 Keller Bay PCR1 E/O 5.0 6.5-9.0 35/14 95 2456 Carancahua Bay PCR1 E/O 5.0 6.5-9.0 35/14 95 2461 Espiritu Santo Bay PCR1 E/O 5.0 6.5-9.0 35/14 95 2462 San Antonio Bay/Hynes

Bay/Guadalupe Bay/Mission Lake PCR1 E/O 5.0 6.5-9.0 35/14 95

2463 Mesquite Bay/Carlos Bay/Ayres Bay PCR1 E/O 5.0 6.5-9.0 35/14 95 2471 Aransas Bay PCR1 E/O 5.0 6.5-9.0 35/14 95 2472 Copano Bay/Port Bay/Mission Bay PCR1 E/O 5.0 6.5-9.0 35/14 95 2473 St. Charles Bay PCR1 E/O 5.0 6.5-9.0 35/14 95 2481 Corpus Christi Bay PCR1 E/O 5.0 6.5-9.0 35/14 95 2482 Nueces Bay2 PCR1 E/O 5.0 6.5-9.0 35/14 95 2483 Redfish Bay PCR1 E/O 5.0 6.5-9.0 35/14 95 2484 Corpus Christi Inner Harbor NCR I 3.0 6.5-9.0 35 95 2485 Oso Bay PCR1 E/O 4.53 6.5-9.0 35/14 95

Segment No.

Bays and Estuaries Segment Names

Recreation Use

Aquatic Life Use

Domestic Water


Cl-1

(mg/L)

-2SO4

(mg/L) TDS

(mg/L)


pH Range (SU)

Indicator Bacteria1


2486 Blind Oso Bay PCR1 E/O 4.54 6.5-9.0 35/14 95 2490 Upper Laguna Madre PCR1 E/O 4.53 6.5-9.0 35/14 95 2491 Lower Laguna Madre PCR1 E/O 5.0 6.5-9.0 35/14 95

2492 Baffin Bay/Alazan Bay/Cayo del Grullo/Laguna Salada PCR1 H/O 4.0 6.5-9.0 35/14 95

2493 South Bay PCR1 E/O 5.0 6.5-9.0 35/14 95 2494 Brownsville Ship Channel NCR E 5.0 6.5-9.0 35 95

1 The indicator bacter ia fo r recreationa l suitability in saltwater is Enterococci. The indicator bacter ia fo r oy ster water use is fecal coliform.

2 For assessment purposes only, the acute aquatic life criterion fo r zinc is 2 9 µg/L. This is base d o n the zin c TMDL approved November 1, 2006, and the Implemen tation Plan approved October 24, 2007.

3 The 24-hour minimum dissolved oxyge n criteria is 3.5 mg/L. 4 A 24-hou r average dissolv ed oxyg en criterio n of 4.0 mg/L and a 24-hour minimum dissol ved oxyg en criterio n o f

1.5 mg/L apply from March 15 t o October 15. During the remainder of the year, a 24-hour minimum dissolved oxyg en criterio n of 3.5 mg/L applies to the segment.

Gulf of Mexico Uses and Numeric Criteria

Segment No.

Gulf of Mexico Segment Names

Recreatio n Use

Aquatic Life Use

Domestic Water


Cl-1

(mg/L)

-2SO4

(mg/L) TDS

(mg/L)


pH Range (SU)

Indicator Bacteria1


2501 Gulf of Mexico PCR1 E/O 5.0 6.5-9.0 35/14 95

1 The indicator bacteria for recreational suitability in saltwater is Enterococci. The indicator bacteria for oyster water use is fecal coliform.

appendix a - site-specific uses and criteria for ...appendix a - site-specific uses and criteria for...

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